因式分解-4x^2+9a^2+12xy-6a-9y^2+1
问题描述:
因式分解-4x^2+9a^2+12xy-6a-9y^2+1
答
-4x^2+9a^2+12xy-6a-9y^2+1
=-(4x²-12xy+9y²)+(9a²-6a+1)
=(3a-1)²-(2x-3y)²
=(3a-1+2x-3y)(3a-1-2x+3y)